Abstract
In this work, we present a new method to reduce the shot noise in phase imaging of digital holograms. A spatial averaging process of phase images reconstructed at different reconstruction distances is performed, with the reconstruction distance range being specified by the numerical focus depth of the optical system. An improved phase image is attained with a 50% shot noise reduction. We use the integral of the angular spectrum as a reconstruction method to obtain a single-object complex amplitude that is needed to perform our proposal. We also show the corresponding simulations and experimental results. The topography of a homemade stepwise of 100 nm high was measured and compared with the atomic force microscope results.
©2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Florian Charriére, Benjamin Rappaz, Jonas Kühn, Tristan Colomb, Pierre Marquet, and Christian Depeursinge
Opt. Express 15(14) 8818-8831 (2007)
Florian Charrière, Tristan Colomb, Frédéric Montfort, Etienne Cuche, Pierre Marquet, and Christian Depeursinge
Appl. Opt. 45(29) 7667-7673 (2006)
Feng Pan, Wen Xiao, Shuo Liu, FanJing Wang, Lu Rong, and Rui Li
Opt. Express 19(5) 3862-3869 (2011)